fix: small observer can't join quorum, so need use getView()

[zichen-gan]

ZK BUG Like QuorumAuthObserverTest#testSmallObserverJoinSASLQuorum
When SASL Quorum like:
server.11=localhost:11223:11224:participant
server.21=localhost:11226:11227:participant
server.1=localhost:11229:11230:observer

The server.1 can't join quorum.

[anmolnar]

Thanks @zichen-gan for taking care of this. Could you please create a jira ticket first?

[anmolnar]

The fix patch makes sense to me at first glance, but what does 'small' mean in this context? One with smaller identifier?

[zichen-gan]

jira zk is full of users, so I can't mention it anymore. I'd be very grateful if you could help me mention one.

@anmolnar yes, small myid observer can't join sasl quorum.

[zichen-gan]

Because zk always takes the initiative to connect myid with a larger myid.And startConnection() only authenticate when peer is voting, so observer can't join quorum.